Process and apparatus for burning powdered coal



MMA@

Feb. 6, 1923..

A. G. KlNYoN PROCESS AND APPARATUS FOR BURNING POW DERED COAL.

. `man ram/13,1918. Y

. Fb-6g1923.

, A. e. KINYON.

PROCESS AND APPARATUS FOR BURNING POWDERED COAL` FILED MAY 13. 1918.

4 SHEET --SHEET 2.

mm TW, N NJ wk E O V T NG/T L.A j o :gz m n ma ,.QC, W/ m QNMTHQ N\ nw ww @D 4 SHEETSA- SHEET 3.

Feb. 6, 1923. A. G. KINYON.

PROCESSAND APPARATUS FOR BURNING POWDERED COAL.

' FILED IVI/W13, 191.8. A

WITNESS A WZ .Feb. 6,1923.

'. A. G. KINYON;

PROCESS AND APPARATUS POR BURNING POWDERED COAL.

4 SHEETS-SHEET 4.

- FILED MAY is. 1918.

W/ZNESS /NVEN TOR. o

A fr0/UVE Y lffatented F w23, v

. l, e", i '-"qp- Tuy-Tren We naar .en ra .i es r l G. KXNYON, OF CHICAGO, ILLINOIS, ASSGNOR T FULLER ENGNEERNG i COMPANDF .ALLEN'IOWFL PENNSYLVANIA.I' i 'i PROCESS AD APPARATUS FOR 'BURNING POWDERED COAL. .Application filed May 13, 1918. Serial N0.'23`/ 1,05i5.

To all whom t may concern.' Fig. 6 is an enlarged View looking down- Be .it known that I', ALoNZo G. KINYON, wardly' on a part of the air passa-ge and `a 'citizen of the United States, residing at through the feeding roll4 of my device.V Chicago, in the county fof Cook and State.- 1g. 7 is an enlarged broken View taken 5 4of Illinois, have invented' certain newl and longitudinally through my feed roller. j 60 useful Improvements vin Processes and Apf ig. 8 is a View taken as online 8--8 in f Y paratu's for Burning Powdered Coal, Iof F ig.- 6; and Y. which the following is a specication. Pigs. 9 and 10 are sections taken on lines My invention relates -to burning pow- 9'-9 and 10`10. respectively, of Fig. 7

l0 dered coal, and other kinds of powdered or Referring more particularly to the draw- 65. fluid. fuels. ingsit will be apparentth'at my device iis i ne of the objects of my invention is to particularly adaptable for burning coal in Provide, a. Simpleandv efficient process for powdered form'. It will be apparent, howthoroughlyand intimately mixing fuel iny over, that fuel in liquid or gaseous forni,

. very fine particles with air in a manner to such as'the hydro-carbons are ordinarily'o obtain maximum heat from thel burning of fOuIlCl in; may be employed i'n connection such fuel. with my invention. When using -a pow- A further object is the provision of a dered fuel', such'as powdered coal, such fuel .Simple 'and efcient meghangm for nti- 1s preferably provided insuitable containers, mately mixing the fuel and air and present SuCh 'aS a barrel ll. It is preferable to pror `75 ing them to be burned in a manner to effect vide Some kind .of container which can be maximum -heat from such fuel, and wthmade tight so as to prevent the loss .of fuel om SHK-,kg I y absorption of moisture, and alsov to prevent AX further Object is the provision 0f d (lllSand(lllil 1`0ll11(lll1 device.

mechanism of the character' mentioned In the drawings, I have indicated a'boiler so which `is substantially. automatic in its op- 12, whlch has a fire-box 13, a grate 1 4, and

mtion' A v an opening 15 for the 'insertion of fuel into A still further object is the provision of' there-box. The parts 12, 13, 14 and 15 amecha'nism adapted to present the fuel may" be of any conventional'or preferred at substantially constant speed in a thin construction, as my device is adaptable for 85 curtain or stream into a stream of a-ir, and H13;'li.(21fi011 t0 UVDHCGS 1' bOilelS DOW in means Afor breaking up the air into very use. or may be applied to new constructions..v tine jets in order to intimately mix the air lV hen installing my device, in the fire-box and fuel upon theircoming together. 13 I preferably cover the grates-ll with a Other objects will. appear hereinafter. refractory materia] 1G, such as fire-brick. or 90 An embodiment of my invention is shown the like, in a manner to completely seal such inthe accompanying drawings, forming a grates and prevent air from entering the part of this specification, and inwhichfire-box through .the grates. The top sur- Fig. 1 is a side'elevation of a device emface of the fire-brick 16 is prefc "ably inbodying my invent-ion shown as applied to clined, as indicated, so that molten slag 95 a furnace, the latter beingshown in vertiwhich will 4be made in burning most coals, cal section 'with the housing 74 removed'. will not run into the burner. Above the Fig. 2 is a rear elevation 'ofmy devi-ce fire-brick 1G` I provide a wall 17 of fireshowfing portions broken away to expose unbrick 'o1- refractory material, which is pref- A derlying parts. Veralol'y disposed in relation to the wall 16, 100

Fig. 3 is an enlarged detail of a feeding so that the space between the walls 16 and l 'rollerand agitator with their connecting opl17 is gradually increased away from vthe @rating` mechanism. burner. In front. of the walls 16 and 17 f l Fig. et'is an enlarged fragmental section preferably provide an upright wall 18 also taken on line .of Fig. 2. of fire-brick, or other refractory material, 105

Figure VL1a is a detail plan view showing against the inner side of the firebox 13. the relation of the pawl shaft, flange and This wall 18 is disposed at an angle someratchet'wheels illustrated in Figures 2 and 4. what near 9() degrees to the walls 16 and 17, Fig. '5 is a view looking at the top of and a wall 19 is extended upwardly away the barrel or container for fuel. from the wall 18 so as to conduct the burn- 11o ing fuel upwardly and toward the front of the fire-box again. The wall 19 is preferably of rebricl, or other refractory material, so as to withstand the heat of the burning fuel. The walls 16, 17 land 18 are all designed to catch the molten slag which is formed during the burning of most all coal and conduct such slag into a point 2() in thefire-.box so that it can be easily collected and removed, and so 'that such slag will not enter the fluesor vtubes 21 of the boiler. The walls 16, 17, 18 and 19 also have the e'ect of retarding the heat caused by the burning fuel, permitting such heat to vbe radiated to the boiler. The Afuel opening ofthe fire-box 13 -ispartially taken up by the walls 16 and 17, and a wall 22. The wall '22 is preferably stopped a short distance below the top ofthe opening 1 5 and a door 23 fitted in such upper part of the opening' 15 so that-access 'can be had to the interior of the fire-box, when so desired. The lateral edges of the walls`16, 17, 18 and 19 are connected by means of vertical walls 24, one of which is shown in Fig-1. The walls 24 arepreferably disposed to one another so I walls encloses a each'side.

that the gradually lincreased from. the point 25, where thefuel begins to burn, to the dischare opening 2 6, or in other words the chamber which increases gradually in size from one end to theV other and is bent back upon itself.

An important feature of myy invention is fproviding'the burning opening .25 .in a corn-v paratively narrow and wide opening so thatr a' thin flamefwill provide quick burning ofv the fuel, and consequently maximum heat.

The fuel is preferably delivered to the' delvice in a container lsuch as barrel 11, and thebarrel is providedwithtrunnions 27, one at; '.l`hetru'nnions- 27 are adaptedto be engaged byy sockets in the ends of two-P armsl28 which are formed on Sector gears29,4 and .the latter mounted fon a shaft 3.0. A'.l `iie-,.

arms 28 are preferably sufficiently flexible -to permit lateralfspringing thereoftov permit" thetrunnions 27 to engage the .sockets in the l l ends of said arms, and sufficiently. rigid to preventith'e' dislocation of. the trunnionsD 27 gears29 are preferably operated by rpinions 31, ne'for'each gear`,'mounted on the'ends' of a shaft 32, and the latter operated by--a'l manually -operable crank 33. A'pawl 31 is' provided to-engage the gear 31 so as to hold the barrel 11in anyfdesired position between those` indicated by'ffull and dotted lines in Fig-1.1'

he barrel 11 is provided :with a -,plane top, see '.Fig.. 5,- when inl shipment'. 'and storage,

distances between them 'will -beV device, when 5o desired."

but whenbrought tothe positionl shown by full ines in' Fi'g; 1, suchplane top is removedfefd a' special 'top inserted; in its placeg-'I This specialtop` comprls'es an I annular member 34, having a flange 35 which rests against a flange 36 on the barrel 11. rllhe fiange 36 is preferably recessed and has an annular gasket 37 compressed between the Hanges 35 and 36 to'provide a 4the flanges 3 5 and 36 to secure saidfianges tightly together. The member 34"'is provided with a cylindrical flange 44'on-which is ordinarily mounted an annular member 45, and between the iange and the annular member 45v is an annular gasket 46 which makes a tight joint between.4 the members 44 and 45.`. When the' barrel is brought to the'lpositionshown in dotted lines in F ig 1, the members' 45 andy 46 are adapted to'slide 'downwardly onto an annular flange 47 formed at thel top of a hopper 48 which is adapted to conductlthe fuel into the'feeding apparatus of my invention.

, ln the member'34 are 'pivoted two doors'l or valvesA 49, pivoted as at 50 to suitable por-l tions of the member 34 and adapted to swing downwardlyjwhenthe parts are inthe positions shown in Fig. 2. 'The doors 49' are heldl fromfalling'down b y means of 'cables 51 connected thereto and'wound on a shaft 52." Atene end of :the shaft 52 I' mount a 52. Theshaft-52,vsee Fig. 4,l has itsends ratchet wheel 54 which`- is 'engaged Aby a;

springlpressedpawl 55 to' holdl the shaft 52 against rotation under the weight of fuel on the 'doors 49 when in the position of-.Fig. 2.

The paw'l 55 '1s-provided with a studor shaft 56 which extends 'out' into the'flange 44 for and cover them,-.'when' `so desired. 'Other' forms of valve `mechanismmay be usedfor Voperation by a wrench,-such as the wrench lettingthe fuel r into the :hopper 48 -of my'l f Iny th'e'flower part'sof th .from paclringyand also-facilitate thepashopper 48 ll pro- 'vide ashaft on which are secured a pluv'sage of thel fuel; downwardly through the dischargeV opening 59 of the hopper into the feeding mechanism. The feeding mechanism comprises a cylinder '60 having av plurality of `recesses 61-` 1n its periphery and adapted, when the cylinder 60 i'srotated, to receive fuel into'the recesses or pockets-.61 and carry such fuel. down through the casing 62ffrom which-it passes out through the narrow opening 63 the casing 62. The length" in the bottom of of the opening 63 is substantially the same as the lengths o f 'the recesses 61, but the -width of the opening63 is preferably very narrow so that the fuel falling downwardly out of the. opening 63 will be a very thin' sheet or curtain of fuel.

Air is preferably fed into-one end of the casing 62 through a pipe 64 intoa chamber 65. The. cylinder 60 is preferably-made up of two parts 60 and 60', see- F ig. 10. The

the recesses 61 is part has the fuel recesses 61 therein, and the part 60 has chambers 66 extending the full lengths of the recesses 61. The'cham bers 66v are connectedat their ends -by. passages 67 with the chamber 65 so that air may pass through the passages 67 into' the Y chambers l66, and from thence .through narrow slits 68 which extend'thefull lengths of the recesses 6l. The parts 60 and 60 rl`he air in passing into the chambers 66 will back up and be forced out through the slits 68 throughout .the full lengths of the' latter owing to the narrow widths of said slits. The purposeof this air being forcedinto -to insure the fuelv being forced out of said recesses aft the ,proper time when they are brought down :Opposite lthe opening 163.

s a means for preventing. the air to. be continuously forced into all of the chambers 66 at the Sametime, I' provide automatic valve mechanism for controlling the openings through the passages '67. An example i of such valves is the provision of recesses 69 formed in the cylinder 60%60, and in each of the recesses -69 a Hall or other body 70 'is provided, which i's-adapted to completely close thelo'wer end of the recess 69 and consequently cut off the passage o f lair through From Fig. .()it will be apthe openings 67. parent that the balls 70 will be yin the bottoms of the recesses 6 9 throughout theiri travel, except a small portionof the rota# tion of the cylinder, and such balls will be in positions `to uncover the openings 67 when l therecesses 6l, readyvto deposit fuel into-the opening 63, are opposite such opening. This closing 'ing with a Vwith a'gear 82 which meshes with a pinionv other kind of motor to We preferably formed separately, and the niemj valve mechanism facilitates the saving of air and prevents the airentering the recesses 6l `which are on the upper side of the cylin* der and receiving 59 of the hopper 48. The cylinder 60-60 is provided with trunnions 7l mounted on ball bearings 7l', andone of said'trunnions 71 is connected through gears72A with the shaft '57, Said shaft 57V may also be mounted on ball bearings- 7 3, the ball bearings, of course, alleviating friction 4and minimizing the power required for operating Vthe device. The gears 72 are preferablyI enclosed in a housing 74, and the other ends of the 'shaft 57 and cylinder 60 lare sealed byplugs or members 75 in the housing covering fuel from the discharge.A

the latter so as to'prevent the waste and loss of fuel which4 might be blown out around said bearings. One ofthe trunnions of cylinder60 is provided with a Worm gear .76

which meshes'with a worm 77, and the latter mounted on a. shaft 78 which is jxournaled ii bearings 79 on the frame ofthe device. he shaft '78 carries a beveled gear 80'meshgear 81, and the latterconnected v830D tliel shaft 84 of a driving motor 84,` which may be an electric motor, or 'any 'provide power ,for operating'the device. The agitating member 57-58. and the cylinder 60-60 are preferably connectedxto the motor in'such a manner as to be rotated quite slowly, and

the. driving mechanism between the motor and such members may be varied to suit the different kinds of-power it is desired to use.

Also connected with the motor 84 is a blower, the casing of which is indicated at 85inFig. 2'.

The v.blower is connected with a"co nducting casing or tube. forming a passage 86, see Figs. 6 andv 8, which passesunder the opening 63 from the feeding mechanism. The cross-area ofthe passage` 86 at -th'e point 87 in Fig. 8 is preferably rectangular or square and providedfwith two doors 88 which are mounted onshafts 89 and formed in such sizes that when to their dotted line positions they will sub! .stantially close the passage- 86, and when between the positions shown in their full and dotted lines they will limit the passage of air through said passage-86. The pas -sage 86 from the point.87 tothe discharge 4.opening 63 is preferably widened laterallyv and made narrow vertically, as clearly indicated in Figs. 6 and 8, and at thepoint 90, immediately under the .opening 63, has a rectangularcross section. Thepassage 86 after leaving the point -90 is-preferably of substantially the same cross-area until it reaches the point 25 in the furnace, and the length of the passage. between the points 90 Aand 25 is preferably such that the fuel and air has just sufficient time to become thorthey are brought' dughly intermingled, because if the vpassage is too long, the fuel will begin tosettle 'out of the air toward the bottoni of'the passage, and if the passage is to'o short,.the fuel 'will not become thoroughly mixed with tlieair;

as'clearly indicated in FigfS. T e inclina?- tionof the screen 91 is preferably 'suchthat the air will beblown through the screenDi-nf V such a manner as'to be thoroughly mixed with thev fuel dropping -from the opening 63.

By incliningthe screen 91., the air will be' directed slightly downwardly after passing suchsereen andinsure'tli'at parts o-f the fuel will beblown down tothe bottom'of the-pas sage in order to, thoroughly mix the lfuel .I

gles againstone-"side of the sheetor curtain withjall .of vthe air passing' through the sc reen. YWhere the screen 9E' is placed vertical,"tliel air passing through the upper -part v"of 4the :tscreen would pt ake inost of the fuel screen 91 tothe proper degree, the fuel is distributed substantially equally toall ofI along`with it, fthe vairpassing through the bottom of the screen would yget 'very little lof the fue 1, 'whilej in inclininggthe the air passing through the screen., i 'j The vopening 63 is preferably provided with a movable member92 which willmovc in a mafnner to increase thev lwidth'V ofthe y opening 63, as clearly indicatedffin Fig.` 8. 35

The screenf 91 is carriedby -the member 92 so thatv the screen 9l always'bears the same relation'to the fuelfalling through the open- The amount of vfuel coming through the opening4` 63 is. therefore controlled. by the member' 92, and the latter `is 4connected through the connecting mechanismv 93 with the shafts-89. so thatvarying 'the width of Sage 86.

not sli own,.ma'y be attached to` a convenientfportion of theconnection 93, such as'at opening 94, for'moviiig thefmenibers 88 and 92.v 50

. the opening 6 3 moves the doors 88 to vary; the amount of air passed through the Vpas-'v AAny desirable operatingfmeans; l

comprising a tube. having-a portion'siibstan-l Itis sometimes 'desirable -to see how much material there is in the hopper48, I 4therefore provide a window 95 in a sutableposition for viewing thev interior. thereof. Inf vraising the barrel 11 f rom its full line posi. tion-to itsdotted line position, the barrel is vinverted some time during suc-h travel by" swinging iton its pinions 27 so thatwhen `it reaches the dotted line position itis inverted' and ready to b'e connected with the top of the'y hopper 48. The ends ofthe 4cylinder 60 may be provided with'annual' gaskets 65 set in,

` as indicated, for facilitating-.the holding' of 'the fuely away -fromthe 'j bearings of said while i haviiiaetraaiand aerl'fh preferred formof my invention, I dodesire toibe limited. to'the precise details set forth, but desire to avail myself of such v ariations and changes as come within the scope l of the appended claims.-

1 claim downwardly against one side of such sheet offuel'. 12. The methodof introducing fuel for burning 'in powdered form comprising feed- -ing the fuel vthrough a long narrow opening in to a-relative'ly shallow space 'i-n a continuous thin sheet or curtain andforcing a cu-rv rent of air divided into line jets at acute 'an- 85 3. Apparatus for burning powdered fuel comprising a casing enclosing a passage substantially rectangular in cross-section rela`v ,tivelynarrow one way and wide theother;

means forfeeding a thin sheet of'fuel' into saidpassage at substantially. right angles. tro the llength of the latter; means for directing airthroughsald passage;` and meansdirect- T96l I ing said airfagainst the fuel-,at an angleto'v the longitudinal median line of the passage.

' 4. Apparatus for burning powdered v'fuel comprising a substantially` rectangular tube l withafuel opening in one side; means for 100 feeding the fuel into said tube through saidv vfuel opening ina thin sheet;` means 'for' varying the v size of said fuel opening; ia source of air 'supply connected with said- 'tube; and means in said tube for controlling 105 'the passageof'air-through said v-ti'ibe, said last-'mentioned 1-nieai'is being connected wit h' v the control-means in saidlfuel opening for simultaneously controlling the'supp'ly of Y fuel and air into said tube. .110

5. Apparatus for burningpowdered.fuel .I

-tially rectangular` in ,cross-section and. relatively narrowin Aonedirectio'n andwide inthe other directionhwith a `narrowslit ezt- 115` ramirnous' member extending across the inte- 120 rior' of the `tube adjacent said fuel opening; and asource of. air supply connected with said tube and adapted'to vdirect air through said member against the fuel as the latter-is. moved across the interior ofthe tube. 125 6. Apparatus-for burningpowdered lfuel comprising, :t tube having a substantially l uniform cross-section throughout a predetermined portion at itsdischarge end said'cioss' section being relatively shallow and wideggf' 130 and 35 one lateral wall; y

i wall inclined with .its upper edge terminat- 60 said uwalls enclosing a chamber increasing gradually in size from one end tothe other, both ends of said chamber being ope'nand the receiving end of subst ntially the size of discharge-end of the latter; means for forcing a current of air through said tube against said fuel;`and a screen across the interior of comprising altube having a substantially uniform cross-section lthi' ougliout a predetermined portion at its discharge end said cross-section beingl relatively 'shallow and wide; walls enclosing a chamber increasing gradually in size from one end to the other, both ends of saidfchamber` being open and the receivingendof substantially the sizeof discharge end of said tube;'means for feeding fuel laterallyinto said tube at a distance from the discharge end of the latter; and a screen extending diagonally 'across 'the interior of thetube at a position adjacent where the fuel is introduced'intosaid tu'be and .adapted to break the. current of air up into line jets before such air engages the fuel.

8. Apparatus for burning powdered fuel comprising a fire-.box having an opening in an imperforate bottom ing in said opening, said 4bottom wall sealing the furnace against air entering .through the lower portion of said furnace; an inter- 40- mediate wall disposed at an acuteangle to the bottom wall above the latter and having one-edge termina-ting in said opening; vertical walls in'said furnacel connected 'with the lateraledges of 'said intermediate and 4,5 bottom walls and having edges terminating in said opening; atube connected with the ',edges of said walls terminating in saidopening; and means for introducing air and fuel into said tube and forcing such air and fuel into said fire-box'.

9. ,Apparatus for burning powdered `fuel comprising a tube; means for forcing air into said tube; a fuel hopper adjacent the tube and in communication therewith; a

roller in said hopper having' a pluralityv of longitudinal recesses in its periphery adapted to take fuel charge such fuel into-the tube; andl means for supplying air to each ofthe recesses in roller ,for facilitating removing the fuel from said recesses and forcing such fuel into. said tube. v 10. "Apparatus for burning powdered fuel having a fire-box, a tube opening into said ure-box, means for feeding fuel to saidtube jets just' before such air engages'- comprising a container and and in communication'with thel having longitudinal fuel A A,periphery and a longitudinalv chamber eX- ytending along and, in communication with 4each recess throughout with said tube; a feed roll vfrom the hopper anddis-A comprising a container and a supply hopper, an annular member adapted -to beseated upon 'the top ofthe hopper andprovided witha flange upon which the container may be supported in inverted -.position, means for holding the annular member in place on `the top vof the hopper, means for clamping y Lainer into the hopper, and means for sup'-,

plying air under` pressure to said tube to convey such .fuel into the fire-box.

l1'. `Apparatus for burning powderedA fuel having a fire-box, a tube opening into'said fire-tbox, means for feeding fuel to said tube a supply hopper, an annular member adapted to be seated upon the top of the hopper and provided with a flangeupon which the container may be supported in inverted position, means-for liolding'the annular member in place on top of the hopper, means for clamping the containerandannular member together, swingingmembers mounted on the annular member, a shaftmounted in lthe annular membei',I connections between the swinging members and the'shaft,locking means associated with the shaft for permitting the swinging members to be held in any desired position, and means for supplying air. under. pressure to said tube lto convey such fuel' .-10,0

into the fire-box.

12.-' Apparatus for burning powdered fuel comprising a tube; a fuel with saidtub'e; a feed roll in saidhopper the length of the recesses ,in 'its hopper connected les latter; an air supply connected with Said i' chambers; and supply of air to saidchambers. A

13.. Apparatus for burning. powdered fuelmeans for controlling the i' comprising a tube; a fuel hopper-'connected' l i .in said hopper having -longitudinal reeessesin its periphery and a longitudinal ichamber extending along in communication 'through a .narrow and opening throughout its length with each recess, there being a passage from the en'd of eachchamber to the end of the roll; an air supply communicating with said passages;

and means in each passage for controlling the supply of air through such passage.

14. Apparatus for burning powdered fuel comprising a tube; a fuel hopper connected with tube; a feed roll in said hopper having longitudinal recesses in its periphery and a longitudinal chamber'extending along and in communication through a narrow opening throughout its length with each recess, there being a passage from the end of .i l chambertolthe end theyrollfand fr 15. V i 'comprising :a tubegfazuel"hopperconnected 1o` l havingflongitudinalfuel'recssesin its .pe-

.and an air 'supply'.connected -with s'aid'pasf1 in said tube' adapted tosubstantially close the interior of such tube'; and a connectiony comprising -a tubehauing a -fuelopening in` clined recesses intersecting 'such passages; a`{ one side; means fforfeeding fuel' through the ball vvalve in each. ofi: the last-mentioned vres-fy cesses adapted ,toclose' the passage intersecting the recess infvhichsaid-'balli is located sages..

hopper.-

withl said tilbe'y'a feed-'m11- in said riphery'vandalongitudinal chamber extending along and v narrow ,opening 'throughout its len l5 end. of

inconimunica'tion through a .hwith leach recess, lthere being a' passage. rom the each chamber to the end of the roll and recesses 'extending inwardly of the periph erjT ofthe roll Vand intersecting said pas-A v sages; `ball valves insaid last-mentioned retheside ofthe -m11 opensaid passages cesses, the .latter being disposed to lcause said balls to automatically close said passages at 'away from the tube and of thevroll at the sidelofthe latter adjacent thetube, yand air supply means eonnected withy said passages.`

16. Apparatus for burning powdered fuel?,

4 f comprising a'substantially.rectangular tube .with a narrow fvfuel opening in one' side, means forffeedihgithefuel into said tubev through ,the fuel opening in. ai thin'- sheet,

` means in the. fuel openingffor` yaryingthe.

i i vsize of the opening, n s y connected with the; tube,1meansj`in^f thetube a source loffair supply".

for controlling .the passage 0f- "airv `therethrough, and means operatively connecting the means in the "fuel-openingV and the-con` cessesI extending :transversely to fuelfopenlng into said tube; means for varying the ,width of said fuel opening; means -v 'for supplying air. under pressure to said e tube; doors hinged at` opposite sides. of and hopperhaving longitudinal recesses inits pe`- rphery and longitudinal chambers extending v said doors lfor' vvarying the amounts of `fuel and air admit- 'for ."burningy pulverized I .along and incommunicationwithithe recesses through narrow, openings' throughout their length, saidroll being provided'withf'passagesextending from the ends ofi-the' cham-- bers to theendof the rolll and-'inclined re-V secting the' passages, means for supplying air through the passages to the-chambers,-

and

and interl balls in the recessesadaptedftocut off the supply of air through thep'as'sages as the 'rei c'esses'and chambers pass upwardly from a position` underneath the s hopper,A and to per- `mit air to enter the'chambers to aid in discharging portions of the 4 roll pass over the lower portion of their. path..

In testimony whereof-' have signed myk trollingmeansl for actuating'dthe saineQin-'nalne vto this specification on this 10th day unison. n l s Apparatus-for burning powdered fuel j ofvMay, A. D.

1918: A ALONZO-G. KINYON.

material from therece'sises as these 

